Publikační činnost akademických pracovníků FEI / FEI Research Outputshttps://hdl.handle.net/10195/345392018-03-20T04:17:53Z2018-03-20T04:17:53ZSuppressing supercooling in magnesium nitrate hexahydrate and evaluating corrosion of aluminium alloy container for latent heat storage applicationHoncová, PavlaPilař, RadimDanielik, VladimirSoska, PeterSádovská, GalinaHonc, Danielhttps://hdl.handle.net/10195/702702018-02-27T03:38:48Z2017-01-01T00:00:00ZSuppressing supercooling in magnesium nitrate hexahydrate and evaluating corrosion of aluminium alloy container for latent heat storage application
Honcová, Pavla; Pilař, Radim; Danielik, Vladimir; Soska, Peter; Sádovská, Galina; Honc, Daniel
The repeating of heating/cooling cycle (75 times) simulating the heat energy storage in magnesium nitrate hexahydrate confirmed supercooling of 27 K, and thus many non-isostructural nucleating agents were tested in concentration of 1 mass% in four charge/discharge cycles. From the whole group, four promising nucleating salts were subjected to detailed study with addition of 0.5, 1, and 2 mass% of nucleating salt. The results show that the addition of Mg(OH)(2), BaO, MgO and Sr(OH)2 suppressed supercooling below 5 K during 50 melting/crystallization cycles. At the similar conditions (temperature range and repeating of heating and cooling), MNH and MNH with 0.5 mass% Mg(OH)(2) or Sr(OH)2 underwent corrosion tests in aluminium alloy tubes to discover applicability of this material for the containers or capsules for heat storage. The long-term contact (&gt; 49 days) of aluminium alloy with melted heat storage material for 664 h provided information about suitability of alloy for storing of magnesium nitrate hexahydrate with nucleating agent.
2017-01-01T00:00:00ZCOMPUTATIONALLY SIMPLE NEURAL NETWORK APPROACH TO DETERMINE PIECEWISE-LINEAR DYNAMICAL MODELDoležel, PetrHeckenbergerová, Janahttps://hdl.handle.net/10195/702682018-02-27T03:38:32Z2017-01-01T00:00:00ZCOMPUTATIONALLY SIMPLE NEURAL NETWORK APPROACH TO DETERMINE PIECEWISE-LINEAR DYNAMICAL MODEL
Doležel, Petr; Heckenbergerová, Jana
The article introduces a new technique for nonlinear system modeling. This approach, in comparison to its alternatives, is straight and computationally undemanding. The article employs the fact that once a nonlinear problem is modeled by a piecewise-linear model, it can be solved by many efficient techniques. Thus, the result of introduced technique provides a set of linear equations. Each of the equations is valid in some region of state space and together, they approximate the whole nonlinear problem. The technique is comprehensively described and its advantages are demonstrated on an example.
2017-01-01T00:00:00ZApplication of mobile devices within distributed simulation-based decision makingBrožek, JosefJakeš, Martinhttps://hdl.handle.net/10195/702102018-02-27T03:31:12Z2017-01-01T00:00:00ZApplication of mobile devices within distributed simulation-based decision making
Brožek, Josef; Jakeš, Martin
As a consequence of the development of the market with information technology, where users are increasingly inclined towards mobile devices at the expense of conventional stand-alone device; increasing user literacy in the use of smartphones and tablets; and the increasing computing performance of mobile devices; a study has been created that addresses the potential of using mobile devices in a distributed simulation. The study also focuses on the possibility of applying the various technologies and architectures in context of using mobile devices in simulation. This article provides overview information about the case study itself, but it strongly focuses on technologies and paradigms that were identified as highly perspective. The paper also explains fundamental themes so that the readers could also apply the information in their home environment. Part of the work itself is an extensive case study carried out in collaboration with a commercial entity.
2017-01-01T00:00:00ZDetection of errors in the layout design of websites for mobile devices based on capturing user behaviourFilip, PetrČegan, Lukášhttps://hdl.handle.net/10195/702042018-02-27T03:30:26Z2017-01-01T00:00:00ZDetection of errors in the layout design of websites for mobile devices based on capturing user behaviour
Filip, Petr; Čegan, Lukáš
Smart mobile touch devices with a small screen such as mobile phones or tablets have become part of everyday life. These devices are taking over conventional personal computers and are increasingly used for accessing web-content. For website developers it is a new challenge which brings issues in the development strategy, because PCs are used differently than mobile touch devices. Adapting web design for every device has become a necessity and a responsive web-design has become standard for every newly developed website. Even if the website development is driven by best practices and developer`s experiences, issues that decrease user experience (UX) on the specific device still exist. This paper presents architecture for capturing user behaviour, followed by a statistical evaluation process which helps to detect errors in the layout design of websites. Information on website use is gathered from real users. Evaluated data is used as feedback for UX-designers who can improve web-design for specific devices and increase user experience.
2017-01-01T00:00:00Z